301-843-6551 | 12333 Washington Square, Waldorf, 20601
Replace Your Car's AC Thermal Expansion Valve or Orifice Tube
McGhees Auto Service
Your car or truck's AC system is under extreme pressure and the thermal expansion valve or orifice tube monitors the amount of pressure and the temperature of your A/C system. It calculates the precise amount of refrigerant that can safely go into the evaporator. A failing expansion valve or orifice tube often causes a vehicle's air conditioner to blow hot air.
Replace or Repair
- Expansion Valves: Too much refrigerant causes your evaporator to get too cold whereas too little refrigerant would result in inadequate cooling. The expansion valve is a complex valve that regulates refrigerant flow. This process of metering the refrigerant adjusts the flow according to the temperature of the refrigerant in the evaporator coil. Talk to one of the pro mechanics at McGhees Auto Service, as this part can be replaced on its own and does not require the entire replacement of the AC assembly.
- Orifice Tubes: Unlike the expansion valve, the orifice tube is a simple fixed device with no moving parts. It therefore cannot vary the flow of refrigerant into the evaporator, but rather causes a permanent restriction in the system. However, like the expansion valve the orifice tube regulates refrigerant flow through the system and filters debris which may come through in its screen. Often fixing a "bad orifice tube" requires replacing the entire evaporator assembly.
More AC Repair Services:
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Anon , 10/04/2021
Mr. Mcghee and staff were very cordial and responsive to all of my inquiries. I inquired about a MD State Inspection for my used SUV and he answered all of my questions respectfully and in detail. He mentioned that vehicles were serviced on a First come, First serve basis depending on how soon I could get my vehicle to their Waldorf location. The service men were cordial and asked if we had any further questions and provided us with a time frame for servicing our vehicle and called as stated when the SUV was ready. I was pleased with the service provided and the attentiveness to our vehicle needs; they even told a few jokes while we waited and provided information about what businesses were around that we could kill time in while we waited for our SUV to be inspected. Would refer this shop to others and may be back for other services necessary for the upkeep of my vehicle. Thank you.